Lab 3 - Investigation of coccidia, coccidiosis of chicken, goose Flashcards
Where does the merozoite develop?
Inside schizont
How many cells can be infected by a merozoite of Eimera?
1
In order to identify the species of a sporulated oocyte, what of the following is needed?
Size of oocyte
How can we recognize chicken coccidia by species in the most simple way?
Based on necroscopy findings
How many epithelial cells can be infected by the content of one Eimera sporocyst?
2
How many epithelial cells can be infected by the content of one schizont of Eimera?
Many
How many cells can be infected by the content of one Eimera oocyst?
8
How many epithelial cells can become infected by 1 Eimeria oocyst at the beginning of infection?
8 cells (4 sporocysts with 2 sporozoites in each)
How many gamonts can develop from one schizont?
Many
What does the sporulated oocyst of coccidiosis contain?
4 sporocysts and 2 sporozoites
What does the unsporulated oocyst contain?
Zygote
How many macrogametes can develop from one macrogamont?
1
Where does the sporozoite develop?
In the oocyst
What does the sporulated oocysts contain?
Sporocysts
Which method of staining can be applied to detect Histomonas in tissues?
PAS
Time lapse from infection of host to apperence of parasite sexual product in faeces is called?
Praepatent period
Which method do you not use to identify the species in the chicken coccidosis?
McMaster method (it counts the number of oocysts but does not tell you which species it is)
Which 3 species are not characterized by blood in the intestines?
E. acervulina, E. mitis and E. praecox
Which species of Eimera are not haemorrhagic?
E. maxima, E. acervulina, E. mitis and E. praecox
Which species of Eimera are haemorrhagic?
E. tenella, E. necatrix and E. brunetti
The correct order in the life cycle of Eimera?
Sporongy (in environment), schizogeny (in intestinal cells), gametogony (in intestinal cells), sporogony
(of new oocysts in the enviroment)
During gametogony when the merozoites develop into the female gametocytes they are called?
Macrogametocytes
Which animal species can be infected by Eimera maxima?
Chicken
What do you find on mucosa during an infection with E. maxima?
Petechiae (also on serosa)
Where does the schizogony of Eimera acervulina take place?
In epithel of Duodenum and Jejunum
Where does the sporogony of Eimera acervulina takes place?
In outer environment
Which animal species can be infected by Eimera acervulina?
Chickens
Where does the sporogony of Eimera maxima takes place?
In outer environment
Which has slightly orange/salmon pink exudate in lumen?
E. maxima
Which statement is true?
E. maxima has a 30x20 μm oocyst that is characteristic
Size of oocyte can be used as identification for which of these species?
E. maxima or ”other” (oocysts of other species are not characteristic to identify species)
Which one has discrete white foci or transverse bands which are ladder-like?
E. acervulina
Where does the gametogony of E. acervulina take place?
Duodenum and Jejunum
Where do the Eimera tenalla schizonts develop?
Caecum
Which animal species can be infected by Eimera tenella?
Chicken
Where do the Eimera brunetti schizonts develop?
Lower part of intestine
What is not true?
E. brunetti is found in the duodenum
Where does the sporogony of Eimera brunetti takes place?
In outer environment
Animals infected by E. brunetti?
Chickens
In coccidiosis caused by E. necatrix, what can be found on the intestines (lumen)?
Unclotted blood
Where do schizonts of E. mitis develop?
In the Jejunum
Which symptom does not appear in case of renal coccidiosis?
Bloody faeces
Which of the following is a symptom of E. truncata?
Torticollis
Where is the E. truncata primarily located?
Renal tubules
In the goose what species of Eimeria affects the kidneys?
E. truncata
Where do schizonts of Eimera necatrix develop?
In Jejunum and Ileum
Where do the Eimera acervulina gamonts develop?
Duodenum and Jejunum
